RE: [xsl] are all strings in a sequence valid potential QNames

Just to check that by "valid potential QName" you mean a string that is in
the lexical space of xs:QName and will therefore constitute a valid QName
provided the prefix is in scope?
($x castable as xs:QName) will not work because (a) it also tests whether
the prefix is in scope, and (b) to avoid the issues of it therefore being
context-sensitive, the W3C spec says this is only allowed if the argument
($x) is a string literal.
So you do need to use the regex approach.
Regards,
Michael Kay
http://www.saxonica.com/http://twitter.com/michaelhkay
> -----Original Message-----
> From: ac [mailto:ac@xxxxxxxxxxxxx]
> Sent: 03 February 2010 07:30
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] are all strings in a sequence valid potential QNames
>
> Hi List,
>
> As for example, in determining element and/or attribute names
> from the first line of a csv file, as well as other similar
> cases, with xslt2.0 (e.g. without "map", "try", and schema),
> what is the best way to check (e.g. true/false) that 1. a
> string is a valid potential QName (e.g. match + what regex?,
> or other option) 2. all strings in a sequence are valid
> potential QNames
>
> Thank you,
> ac